lindab | air valves Diffuser supply air VVTK Technical data 1 Air flow, q [l/s] and [m3/h], total pressure drop, Δpt [Pa], throw length, l0,2 [m], and 2 A-weighted sound power level, LWA [dB], for different settings, a [mm], are shown in the graph. 3 Note! The A-weighted sound power level, LWA, will increase by 3 dB when the valve is mounted in a bend. 4 Sound power level, LWok [dB], in octave bands is calculated as LWA + Kok. Kok is found in the table below. 5 Ød Diffuser Centre frequency nom mounted in [Hz] 63 125 250 500 1K 2K 4K 8K 6 100 Duct -2 -7 -7 -4 -4 -7 -10 -14 125 Duct -2 -7 -7 -4 -4 -7 -10 -14 7 Sound attenuation, ΔL, [dB] 8 Ød Diffuser nom mounted in Centre frequency [Hz] 63 125 250 500 1K 2K 4K 8K 9 100 Duct 24 20 18 12 10 10 10 10 125 Duct 24 20 18 12 10 10 10 10 10 Air jet diffusion pattern Maximum vertical width, bv = 0,1 × l0,2 m Maximum horizontal width, bh = 0,6 × l0,2 m 11 Measurement of air flow Data is available in a separate brochure. 12 Δ pt [Pa] Δ pt [Pa] Ø 100 200 100 50 20 6 6,0 5,0 a [mm] 8 10 12 4,0 l0,2 [m] 3,0 45 40 35 30 25 LWA [dB(A)] 10 5 20 10 50 20 30 40 50 [l/s] 100 180 [m3/h] q Ø 125 200 100 50 20 6 6,0 5,0 a [mm] 8 10 12 4,0 l0,2 [m] 3,0 45 40 35 30 25 LWA [dB(A)] 10 5 20 10 50 20 30 40 50 [l/s] 100 180 [m3/h] q 13 14 15 16 17 18 6 We reserve the right to make changes without prior notice 2014-03-07
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